Geography DMPQ

There are three types of plate boundaries: Divergent Plate boundaries: where plates move away from each other. : These are oceanic ridges where new oceanic lithosphere is created by upwelling mantle that melts, resulting in basaltic magmas which intrude and erupt at the oceanic ridge to create new oceanic lithosphere and crust. As new oceanic … Read more

Excessive rainfall in river catchments or concentration of runoff from the tributaries and river carrying flows in excess of their capacities. Backing water in tributaries at their confluence with the main river. Synchronization of flood peaks in the main rivers or their tributaries. Intense rainfall when river is flowing full. Poor natural drainage system. Landslides … Read more

This theory was put forth by Alfred Wegener. The continental drift hypothesis was developed in the early part of the 20th century. According to this theory, e continents were once united into a single supercontinent named Pangaea, meaning all earth in ancient Greek. He suggested that Pangaea broke up long ago and that the continents … Read more

Climate change is inevitable. The best strategy to deal with climate change is adoption of practices to make our farming more resilient. ICAR has launched a network of project called NICRA. It stands for National innovation on climate resilient agriculture. The salient features of NICRA are as follows:   It takes into account the critical … Read more

Trade winds: It is the wind blowing steadily towards the equator from the north-east in the northern hemisphere or the south-east in the southern hemisphere, especially at sea. Two belts of trade winds encircle the earth. These winds are called trade winds because of the fact that they helped the sea merchants in sailing their … Read more

Every location on Earth receives sunlight at least part of the year. The amount of solar radiation that reaches any one spot on the Earth’s surface varies according to: Geographic location Time of day Season Local landscape Local weather. Because the Earth is round, the sun strikes the surface at different angles, ranging from 0° … Read more

The parent material for most of the black soil are the volcanic rocks that were formed in the Deccan Plateau (Deccan and the Rajmahal trap).In Tamil Nadu, gneisses and schists form the parent material. The former are sufficiently deep while the later are generally shallow.These are the region of high temperature and low rainfall. It … Read more

Dams and flood control The efficiency of dams to withhold floods has always been put to question. Critics have also termed dams as harbinger of floods claiming that the essential scientific assessment for consistent release of water to avoid build up is rarely done. Absence of a standard operating procedure for releasing water from the … Read more

Batholiths A large body of magmatic material that cools in the deeper depth of the crust develops in the form of large domes. They appear on the surface only after the denudational processes remove the overlying materials. They cover large areas, and at times, assume depth that may be several km. These are granitic bodies. … Read more

India’s geographical location of it being in tropical zone make it potent solar energy power house. As per Ministry of New and Renewable Energy or MNRE with about 300 clear and sunny days in a year, the calculated solar energy incidence on India’s land area is about 5000 trillion kilowatt-hours (kWh) per year. Solar Energy … Read more